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From bc0484db504974e91b2b9b1549f60e9f1d094861 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 24 Jan 2018 18:34:26 -0500
Subject: [PATCH 3282/4131] drm/amdgpu/pm: report gpu average power via hwmon
API
Expose power via hwmon.
Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 674aeac..c72185b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1168,6 +1168,38 @@ static ssize_t amdgpu_hwmon_show_vddnb_label(struct device *dev,
return snprintf(buf, PAGE_SIZE, "vddnb\n");
}
+static ssize_t amdgpu_hwmon_show_power_avg(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct amdgpu_device *adev = dev_get_drvdata(dev);
+ struct drm_device *ddev = adev->ddev;
+ struct pp_gpu_power query = {0};
+ int r, size = sizeof(query);
+ unsigned uw;
+
+ /* Can't get power when the card is off */
+ if ((adev->flags & AMD_IS_PX) &&
+ (ddev->switch_power_state != DRM_SWITCH_POWER_ON))
+ return -EINVAL;
+
+ /* sanity check PP is enabled */
+ if (!(adev->powerplay.pp_funcs &&
+ adev->powerplay.pp_funcs->read_sensor))
+ return -EINVAL;
+
+ /* get the voltage */
+ r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_GPU_POWER,
+ (void *)&query, &size);
+ if (r)
+ return r;
+
+ /* convert to microwatts */
+ uw = (query.average_gpu_power >> 8) * 1000000;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", uw);
+}
+
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, amdgpu_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 0);
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 1);
@@ -1180,6 +1212,7 @@ static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, amdgpu_hwmon_show_vddgfx, NULL, 0)
static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, amdgpu_hwmon_show_vddgfx_label, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, amdgpu_hwmon_show_vddnb, NULL, 0);
static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, amdgpu_hwmon_show_vddnb_label, NULL, 0);
+static SENSOR_DEVICE_ATTR(power1_average, S_IRUGO, amdgpu_hwmon_show_power_avg, NULL, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -1194,6 +1227,7 @@ static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_in0_label.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_label.dev_attr.attr,
+ &sensor_dev_attr_power1_average.dev_attr.attr,
NULL
};
--
2.7.4
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